External Drive for Apple laptop - deleting some files

Using an external drive with an Apple laptop is a convenient way to store photos, videos, documents, backups, and other large files. However, it can be concerning when files unexpectedly disappear, cannot be deleted, or seem to vanish after connecting the drive to a MacBook.

If you're experiencing problems with deleting some files from an external drive on an Apple laptop, the cause may involve permissions, the drive's file system, read-only access, corrupted directories, or files being used by another application.

Check the Drive's Format

The first thing to check is the external drive's file-system format.

Connect the drive to your MacBook and open Disk Utility. Select the external drive and review the information displayed for the volume.

Common formats include:

APFS

Mac OS Extended

exFAT

FAT32

NTFS

APFS and Mac OS Extended are designed for Apple systems, while exFAT is useful when the drive needs to work with both macOS and Windows.

NTFS deserves special attention. macOS can generally read NTFS drives but does not natively provide full write access in the same way it does for Mac-compatible formats. As a result, you may be able to open files but have difficulty deleting, modifying, or adding files.

Check Whether the Files Are Locked

If only certain files cannot be deleted, those files may be locked.

Select the file in Finder, press Command + I, and look for the Locked option in the information window.

If the file is locked, unlock it and try moving it to the Trash again.

You should also check whether the file is currently being used by another application. For example, a video opened in a media player or a document currently being edited may not delete normally until the application is closed.

Check Permissions

Permissions can also prevent deletion.

Select the external drive in Finder and press Command + I. Expand Sharing & Permissions and check your access level.

If your account doesn't have appropriate permissions, macOS may prevent you from modifying or deleting certain files.

Do not randomly change ownership or permissions on important folders, particularly if the drive contains backups or application-managed data.

Empty the Trash

Sometimes files appear to remain on the external drive even after being moved to the Trash.

When you delete something from an external drive, macOS may place it in a hidden Trash folder associated with that drive. The storage space may therefore not immediately become available.

After confirming that you no longer need the files, empty the Trash and check the available capacity again.

Be careful when emptying the Trash because deleted files may become difficult to recover afterward.

Run First Aid in Disk Utility

If certain files refuse to delete or Finder behaves strangely, the drive's directory structure could have errors.

Open Disk Utility, select the external volume, and choose First Aid.

First Aid can check the file system and attempt to repair certain directory-related problems.

If the drive contains important information, consider making a backup before performing repairs whenever possible.

Check for Drive Problems

Unexpected file deletion, missing files, or repeated filesystem errors can sometimes indicate a failing external drive.

Warning signs include:

The drive disconnects unexpectedly

Files take unusually long to open

Finder repeatedly freezes

Copy operations fail

The drive makes unusual sounds

The Mac frequently asks you to repair the disk

Files become corrupted or disappear

If you notice several of these symptoms, stop using the drive for unnecessary operations and back up important data as soon as possible.

Avoid Immediately Formatting the Drive

Formatting may solve many filesystem problems, but it also erases the data stored on the volume.

If your goal is simply to delete a few unwanted files, do not format the drive as a first troubleshooting step.

Formatting should generally be considered only after important data has been backed up and you have confirmed that you no longer need the existing filesystem contents.

Consider Compatibility With Windows

If the external drive is regularly moved between a Windows PC and an Apple laptop, file-system compatibility may be responsible for some unusual behavior.

For cross-platform storage, exFAT is commonly used because both modern Windows and macOS systems can read and write it.

However, changing the format requires reformatting the drive, which destroys existing data. Back up the contents first.

What If Files Keep Disappearing?

If files are disappearing without you intentionally deleting them, investigate the issue more carefully.

Check whether another Mac or PC is accessing the drive. Also consider synchronization software, backup programs, media-management applications, or automated cleanup tools.

If the drive contains irreplaceable files, make another copy before continuing to troubleshoot.

Final Thoughts

If you're using an external drive for an Apple laptop and can delete some files but not others, don't assume the drive is failing immediately. Check the drive's format, file permissions, locked status, and whether the files are currently being used.

Disk Utility's First Aid can help with certain filesystem problems, while checking the drive's health can reveal signs of hardware failure.

Most importantly, back up important data before performing repairs, reformatting, or other destructive operations. If files are unexpectedly disappearing or the drive is becoming unreliable, prioritize data recovery and backup rather than repeatedly attempting to modify the drive.